Lubricating device



vvMaymf, 1938- J. L'. CREVELING 2,l18',373

' LUBRICATING DEVICE Filed sept. 17, 1931 *fr* im A d "A Y y/ '11111, l1111114 '111/1111, 11111111. '1111111 11111111111. 1111111111111111111111/111/7 INVENTOR ATTORNEY Jb L. Ceara/.avc

l .Patented May 24, 193s LUBRICATING DEVICE John L. Creveling, Tucson, Ariz., assignor to The Lubrication Corporation, South Bend, Ind., a corporation of Delaware Application September 17, 1931, Serial No. 563,402

.5 Claims.

This invention relates to lubrication guns and is illustrated as embodied in a compression gun of the high pressure type. An object of the invention is to provide a lubricating gun in which the high pressure cylining of the high pressure cylinder with lubricant I which is preferably filled from a cartridge or container which may be removed when empty and replaced when refilled or have a similar, charged receptacle substituted lfor it. A The vcontainer is preferably arranged at one side of the high pres- 16 sure cylinder and supplies the lubricant through a port in the side wall of the cyllnder'which is uncovered by a plunger at the outer end of the charging stroke and covered during the first part of the pressure stroke.- f

Another feature of the invention relates to a movable follow up piston within the container which `reduces the volume of the lubricant chamber as it is used and which, if desired. malr be manually moved to apply 'pressure on the lubri- 35 cant in' -the container and forcibly introduce into the high pressure cylinder.

Other objects and features of the invention will be apparent from the following .description of certain embodiments which'I have shown in 30 the accompanying drawing in which:

Figure 1 is a longitudinal section through a lubricating gun constructed in accordance with the invention in which the high pressure cylinder is fedthrough a, replaceable container having a 35' piston moving at right angles to the cylinder;

' l Figure 2 is a modified form oi' the invention in rwhich the axis of the lubricant container isv arrangedparallel to the high pressure cylinder and .is of the semi-permanent type having a piston 40 which is adapted both to follow up the lubricant or to be manually moved to discharge the same;

Figure 3 is a further modified form illustrat- K.

sure for one 'end of the container 42 which may be threaded to the closure in a semipermanent ing adetachable lubricant container having similar ends, either ofv which may be used as the diiA discharge opening or as an opening for refilling the container with lubricant.

Referring to Figure l, I0 is a high pressure uniform diameter cylinder enclosing a iittedV plunger I2 having a handle I4, which recipro- 50 cates in .the cylinder and uncoverslport I6 at the outer end of its stroke. Outward movement of the plunger creates a vacuum in the cylinder I0 which draws lubricant through portv I6 to fili the cylinder. The port I6 is' covered during initial 55 movement of the plunger and lubricant 'his trapped der I0 and terminates slightly (ci. zzn-47.3)

between the plunger and the discharge opening I3, which is closed by a spring pressed checkvalve 20, to permitthe lubricant to flow in one direction to coupling 22, which is adapted to grip a tting 24 by the pressure of the lubricant on 5 cup 25 secured to slidable tube 26 and make a grease tight joint between'the end of the tube and the fitting. Port I6 is the-outlet for a tube 28 which projects at right angles from the cylinbelow the end l0 cover or closure 30 of a replaceable lubricant container 32, which is detachably secured to the gun by lip members 34, which engage comple- Amentary projections formed on the Abody portion of the gun. Within the container 32 is a l5 follow up piston 36, which ordinarily remains in assembled relation with the gun when the detachable container is removed. Piston 36 is guided by tubular member 28, and advances toward the top of the container as the lubricant. 20 is consumed by vbeing drawn through the portV I6 into the cylinder I0.

The under side of piston 36 may be vented by cutting away portions of projection 35, or by providing opening 31 in the disc like base 39 but 25 this is not essential, as in ordinary operation there is sufficient leakage of air between the lip members 34 and the projection portions to prevent the formation of a vacuum on the under side of the piston. A spring washer 38 may, if 3'() desiredfbe snapped in a groove formed on the upper end of tube 28 to prevent piston 36 from slipping oil' theI end ofthe tube when the detachable container 32 is removed for the installation of a charged container to replace one from which 35 the lubricant has been exhausted.

In the construction shown in Figure 2, I have shown a coupling which is adaptable for use with the fitting disclosed in my co-pending application Serial No. 5,270, led January 28, 1925, and `40 in which themember 40 connected to or inte.

gralwith the high pressure cylinder forms a cloinstallation or may be equipped with quick detachabie portions similar to that illustrated in Figure 1.

Within container 42 is afollow-up piston 44 1 slidably mounted on a guide 46 -which is slidable -within the c'over 48, and may be moved relative .50

to the cylinder by handle 50. Piston 44 may move freely to follow up the lubricant when the guide 46 remains stationary or the guide may be movedv outwardly without disturbing the pis` ton, but movement of the guide 46 toward the 55 cant for relling the container.

lubricant causes the edge of the latch member 52 at one side of the opening 5I to engage the rod and move both piston and guide as a unit toward the lubricant. Latch member 52 is maintained in engagement with the guide by spring 54 which yields during the outward movement of the handle and permits the operator forcibly to move the piston to discharge ylubricant; through passage 56 past the spring loaded check valve 58 into the discharge port I6 of the high pressure cylinder I0.

When container 42, is empty and piston .B4 has contacted with the'stop 43, cover 48 may be removed and the guide and piston withdrawn from the container to permit relling with lubricant. Prior to reassembly of the gun, latch 52 is released manually and piston M is moved on the guide toward cover 48, soas to be in position to contact the lubricant in the iilled container.

In the form shown in `igure 3, the lubricant container 60 is formed with similar threaded ends, 62 and 64, either of which may be threaded into the end member 66, forming an inlet conduit to cylinder I0.4 Withinthe container 60 is a piston 68 provided with oppositely extending washers or followers 10 and 12,'which act to exert pressure in either direction, depending on the direction of movement of the piston. The followers 10, and l2v are preferably of cup-shape and may be made of sheet metal or df organic material, but if made in two parts are preferablysecured together. Container 50 is detachable and after piston 68 has moved to the extreme left, empty container 60 may be removed from the gun and inserted in a supply of lubri- It is immaterial which side of the cylinder 60 acts as the lubricant reservoir and the container may be connected at or filled from. either end. As shown in Figure 3, the portion to the left of piston 68 forms the lubricant chamber and the opening in projectionA 62 renders the piston accessible for the insertion oi a suitable tool which may be used to force piston 68 toward the left and discharge the lubricant to the high pressure cylinder l0. Under ordinary circumstances atmospheric pressure may be sufcient to urge the piston 68 toward the discharging end.

While I have illustrated and described several vernbodiments of the invention, it is to be understood that this showing and description are illustrative only, and that I do not regard the invention as limited to the forms shown and described,

or otherwise, except by the terms of the followaiiasvs the cap in a direction parallel to the axis thereof and at a right angle to the axis of the said chamber with its passage in communication with, the inlet, a removable lubricant container having an open end threadedly connected to the cap, and a. piston slidably mounted on the tube in the container to force the lubricant inwardly through the tube and inlet.

2. A lubricant gun including, a body having a chamber with an inlet opening, a tubular member permanently secured to and projecting from the body in communication with the opening, a piston slidable on the'tubular member, a lubricant .cartridge open'at its inner end, closed at its outer end and adapted to receive the piston.

'and means for connecting the cartridge to the body with the piston within the cartridge including a threaded connection between the inner end of the cartridge and the body forming the sole means for holding the cartridge in position to cooperate with the piston.

3. AA lubricant gun including, a body having a chamber with a lateral opening, a tubular member permanently secured to and projecting later- A ally from the body in communication with the opening, a piston slidable on the tubular member, a lubricant cartridge open at its inner end, closed at its outer end and adapted 4to receive the piston, and means for connecting the cartridge to the body with the piston within the cartridge including a threaded .connection between the inner end of the cartridge and the body forming the sole means for holding the cartridge in position to cooperate with the piston.

4. A lubricating device comprising a lubricant pump having an inlet and an outlet, a tubular member connected to said pump in communication with the inlet. and extending outwardly from the pump, an annular connecting member carried by the pump concentric with the tubular member, and-a lubricant cartridge having means at one end for attachment to said connecting memberand having an opening in said end through which the tubular member may project to a point adjacent the other end of the cartridge.

5. A lubricating device comprising a lubricant pump having an inlet and an outlet, a tubular member connected to said pump in communication with the inlet and extending outwardly from the pump, an annular screw-threaded connecting member carried by the pump concentric with the tubular member, and lubricant ,cartridge having threads at oneA end for attachment to said connecting member and having an opening in said end through which the tubular member may project to a point adjacent the other end of the cartridge.

JOHN L. CREVELING. 

